Atomic Ammunition Atomic Ammo .357 Rem. Magnum 158gr. Bonded Jhp 50-pack. The loss of petals allows for additional wound paths increasing the likelihood of striking a nearby blood vessel organ or central nervous system all while reducing the core weight to protect against the danger of over-penetration. The central core should expand to 150percent of the original diameter retain 75percent or more of the projectile's weight and penetrate not less than 18 inches of ballistic medium. At Atomic Ammunitionwe know that you carry and use real guns not test barrels. All of our external ballistic information is obtained from tests using common firearms that you are likely to own and use not inflated misleading information from test barrels. We feel that this is the most accurate and useful information for our customers so it is the only information that we provide. Specifications for Atomic Ammunition Atomic Ammo .357 Rem. Magnum 158gr. Bonded Jhp 50-pack: Manufacturer: Atomic Ammunition Caliber: .357 Magnum Number of Rounds: 50 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 158 grain Cartridge Case Material: Nickel Plated Brass Muzzle Velocity: 1350 ft/s Primer Style: Centerfire Dimensions: 1.95 X 2.85 X 4.70 in Package Contents: Atomic Ammunition Atomic Ammo .357 Rem. Magnum 158gr. Bonded Jhp 50-pack